Screen is dark on Linux

[D8174]

[D8174]

When I set r_overBrightBits to 0 it works fine. So I don't know if this is actually a bug or I changed my settings by accident. Or maybe r_overBrightBits should be 0 by default on Linux.

[aufau]

This is because original JK2 and jomme doesn't have any way to control gamma ramp in windowed mode. In original JK2 it r_overbrightbits is just automatically disabled when you're in windowed, but jomme wants to render correctly regardless hence the screen is dimm. Recorded video will have correct brightness and this is what matters the most. You should be able to get normal brightness in fullscreen mode on your screen too.

Fixing this would require adding fragment shaders for gamma correction.